Studies in photochemistry. Part VIII. The ultraviolet, proton magnetic resonance, and mass spectra, and photocyclisation of some styrylnaphthalenes to some benzo[c]phenanthrenes and chrysenes
作者:E. V. Blackburn、C. E. Loader、C. J. Timmons
DOI:10.1039/j39700000163
日期:——
Kinetic data for the first-order ring opening of the dihydro-intermediates, formed on the photocyclisation of several styrylnaphthalene analogues, are presented and some aspects of their electronic spectra are discussed. The photocyclodehydrogenation of 1,2-di-(2-naphthyl)ethylene to benzo[g,h,i]perylene proceeded via dibenzo[c,g]-phenanthrene. Photocyclodehydrogenation of 2-methyl-1-(2,4,6-trimet
给出了在几种苯乙烯基萘类似物的光环化反应中形成的二氢中间体一阶开环的动力学数据,并讨论了其电子光谱的某些方面。1,2-二- (2-萘基)乙烯与苯并[所述photocyclodehydrogenation克,ħ,我]苝进行经由二苯并[ c ^,克] -菲。2-甲基-1-(2,4,6-三甲基苯乙烯基)萘,2-甲基-1-苯乙烯基萘,1-(2,4,6-三甲基苯乙烯基)萘和1-(2,6-二氯苯乙烯基)的光环脱氢萘产生预期的衍生物。将1-溴-2-苯乙烯基萘和2-(2,4,6-三甲基苯乙烯基)萘光环化为苯并[ c]菲和2,4-二甲基苯并[ c ]菲。没有观察到取代基的迁移。电子对这些苯乙烯基萘的影响与其光化学行为有关。讨论了苯乙烯基萘的uv和1 H nmr光谱。